Question

A- 2 . ( 3 X -5 ) - X =10+3 . ( 4 X - 6 )

B- 3 X - 4 = - X + 7
2 5 3 3

Answer 1

Oi,

Resolução

a) 2 . (3x - 5) - x = 10 + 3 . (4x - 6)
6x - 10 - x = 10 + 12x - 18
6x - x - 12x = 10 - 18 + 10
- 7x = 2 . (-1)
7x = - 2
x = - 2/7

b) 3x/2 - 4/5 = - x/3 + 7/3

MMC = 30

45x/30 - 24/30 = - 10x/30 + 70/30

Eliminando os denominadores

45x - 24 = - 10x + 70
45x + 10x = 70 + 24
55x = 94
x = 94/55

Espero ter ajudado e bons estudos !

Answer 2

$a) \\ \\ 2 * (3x -5) -x = 10 + 3 *(4x - 6 ) \\ \\ 6x - 10 - x = 10 + 12x - 18 \\ \\5x - 10 = 12x - 8 \\ \\ 5x - 12x = -8 + 10 \\ \\ -7x = 2 (-1) \\ \\ 7x = -2 \\ \\ => x = -\dfrac{2}{7}$

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$b) \\ \\ \dfrac{3x}{2} - \dfrac{4}{5} = \dfrac{-x}{3} + \dfrac{7}{3} \\ \\ \\ \dfrac{15x -8 }{10} = -\dfrac{x - 7}{3} \\ \\ \\ \dfrac{15x -8 }{10} +\dfrac{x - 7}{3} \\ \\ \\ \dfrac{45x -24 + 10x - 70}{30} \\ \\ \\ \dfrac{55x -94}{30} \\ \\ \\ 55x = 94 \\ \\ x = \dfrac{94}{55}$